InCAP 2019

2nd Indian Conference on Antennas & Propagation (InCAP2019)
December 19-22, 2019 | Ahmedabad, India

Last date for Student Travel Grant Application is October 31, 2019

Notification of Acceptance : September 14, 2019

Early Bird Registration : October 31, 2019

Last Date for Registration : Dec 10, 2019

Congratulations! 2018 IEEE Indian Conference on Antennas and Propogation (InCAP) has been posted to the IEEE Xplore digital library effective 2019-07-25

A Half-Day Workshop by Two Experts From IITs On Design and Development of Passive and Active Microwave Metamaterial Absorbers
December 18, 2019 | 2 pm to 6 pm | Narayani Heights Hotel (Conference Venue)

Abstract

Electromagnetic (EM) wave absorbers have drawn significant research interest owing to their widespread applications such as radar cross section reduction, stealth technology, EM interference, EM compatibility, wireless communication, and so forth. However, conventional microwave absorbers are mostly limited to minimal thickness of one-quarter wavelength and inadequate for specific band applications due to constant medium parameters; further, they are usually fragile, bulky, and have large surface mass density. Therefore, it is difficult to implement them in various practical applications. With the advent of metamaterial approaches, absorber structures can be made not only ultra-thin, but also near-unity absorption can be achieved over different frequency bands including microwave and optical frequencies ranging from terahertz to infrared. These metamaterial absorber structures are generally composed of a periodic array of top metallic pattern and ground metal plane separated by a dielectric substrate.

Typically, metamaterial absorbers based on copper/metal microprinting technologies are narrow-band in nature. Using this technology, various single, double and multi- band absorbers have been reported in literature. But for stealth applications, broadband absorption over entire microwave bands, such as the C, X and/or Ku bands, is necessary. Single- and multi-band absorbers are based on resonating structures, where absorption primarily occurs through dielectric loss. On the contrary, broadband absorbers can be realized by appropriately depositing resistive and conductive patterns on a substrate. Lumped resistors, resistive sheets, and resistive paints are the principal sources of ohmic loss behind wideband absorption.

A passive absorber, made from resonating structure and/or resistive material, exhibits fixed reflectivity characteristics, and sometimes have limited applications. An active absorber, in contrast, has reconfigurable properties owing to external stimuli. A switchable active absorber can serve the purpose of an absorber as well as a reflector just by changing the bias voltage of the design. A tunable absorber, operating in a wide frequency range, may replace a broadband absorber in several applications. Varactors and p-i-n diodes are generally used in electronically regulated active absorber designs, due to their small switching speed, large tuning range, compact size and low cost.

This workshop will describe in-detail about metamaterial absorbers and their associated mechanisms. Various narrow-band and wideband passive absorbers will be discussed in terms of their resonant frequencies, equivalent circuit modelling, surface current distributions, parametric variations, and measurement procedures. Subsequently, active absorbers will be explained by showing their simulation set ups, biasing configuration, diode characterization, and practical realization. The content of the workshop has been carefully designed such that the researchers from various microwave backgrounds can get widely benefitted through attending the workshop.

Workshop Instructor

1. Dr. Kumar Vaibhav Srivastava, IIT Kanpur
2. Dr. Saptarshi Ghosh, IIT Indore

Dr. Kumar Vaibhav Srivastava
Dr. Kumar Vaibhav Srivastava

Dr. Kumar Vaibhav Srivastava has received the B.Tech. degree in Electronics Engineering from Kamla Nehru Institute of Technology, Sultanpur, India, in 2002, the M. Tech. degree in Electrical Engineering from Indian Institute of Technology, Kanpur, India, in 2004, and the Ph.D. degree in Electrical Engineering from Indian Institute of Technology, Kanpur, India, in 2007. He is recipient of Cadence Gold Medal for Best M.Tech. Thesis in any of the Engineering Departments at IIT Kanpur. After completing his PhD program, he worked with GE (General Electric) Global Research Centre Bangalore for one year in 2008. In GE, he contributed significantly on Wireless Power Transfer and Subsea Communication program.

He joined as an Assistant Professor at Department of Electrical Engineering, Indian Institute of Technology, Kanpur, India, in January 2009. Currently he is Professor with Department of Electrical Engineering, Indian Institute of Technology, Kanpur, India. He has authored more than 200 journal and conference papers with international repute. He has supervised 41 M.Tech. thesis and 7 Ph.D. thesis till date and currently involved with supervision of 3 M.Tech. and 7 Ph.D. students. He has 2 international patents and three national patents to his credits. He is involved with several research projects with Department of Science and Technology (DST), Indian Space Research Organization (ISRO), Defense Research and Development Organization (DRDO), Ministry of Human Resource and Development (MHRD), General Electric (GE) etc.

He has received Young Fellowship Awards (Class of 1979 Research Fellowship in 2013 and Dr. Shukla Faculty Research Fellowship in 2017) from IIT Kanpur for his significant contribution as a faculty member at IIT Kanpur. He is also recipient of ‘IEI (Institution of Engineer, INDIA) Young Engineer Award for year 2014-15 for his significant contribution in Electrical Engineering. He has received several Best Paper Awards in international conferences. His research interests include meta-materials, microwave antennas, MIMO antennas, microwave absorbers, finite-difference time-domain (FDTD) technique and microwave cloaking. He is member IETE, member IEI and Senior Member IEEE. He has served as Chairman of IEEE UP Section, India and currently he is Executive Committee Member of IEEE India Council. He is reviewers of various journals in area of Microwave and Antenna and serving currently as Associate Editor of Wiley Microwave and Optical Technology Letters.

Dr. Saptarshi Ghosh
Dr. Saptarshi Ghosh

Dr. Saptarshi Ghosh has received his B. E. degree in Electronics and Telecommunication Engineering from Bengal Engineering and Science University (currently known as IIEST), Shibpur in 2009. He has completed his M. Tech. and Ph.D. from the Department of Electrical Engineering at IIT Kanpur in 2013 and 2017, respectively. Currently, he is working as an Assistant Professor in the Discipline of Electrical Engineering at IIT Indore. Dr. Ghosh is a recipient of several awards, including INAE Young Innovative Student Projects Award, Young Scientist Award from URSI-ATRASC, Academic Excellence Award, and several Best Paper Awards. He has authored and co-authored over 40 referred articles. His current research interests include electromagnetic metamaterial, frequency selective surface, microwave absorber, and other periodic structures.

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